[tor-bugs] #22990 [Metrics/Library]: Add a heartbeat log message indicating progress and estimated time left

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#22990: Add a heartbeat log message indicating progress and estimated time left
-----------------------------+--------------------------------
 Reporter:  karsten          |          Owner:  iwakeh
     Type:  enhancement      |         Status:  needs_revision
 Priority:  Medium           |      Milestone:
Component:  Metrics/Library  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:  metrics-2017     |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:  iwakeh           |        Sponsor:
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Comment (by karsten):

 Replying to [comment:12 iwakeh]:
 > Replying to [comment:10 karsten]:
 > > ...
 > > > More importantly, `readTarballs` needs to catch the IOE to avoid
 halting the process just b/c of one tarball being faulty.
 > >
 > > Ugh, very good point. That's an oversight.
 >
 > This is an excellent example where having decent tests would serve as
 documentation and ensuring that the wanted behavior, i.e., keep
 processing, is kept when making changes.

 Indeed.

 And it's also an excellent example how code review works! :)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22990#comment:14>
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